Hi, I got the rear corners from Just Kampers. They were new full height genuine corners that I cut down to use just the bits that I needed.
Not the cheapest way of doing it but all the pattern lower sections that I saw were really poor quality and fit.
Even these aren't exactly the correct shape for a crossover as the rear corners are a unique one year only design... (but only anoraks like me would spot that).... despite that they fit well and do the job.